The Boxster RS 60 Spyder. - Porsche
The Boxster RS 60 Spyder. - Porsche
The Boxster RS 60 Spyder. - Porsche
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VarioCam Plus<br />
<strong>The</strong> <strong>Boxster</strong> <strong>RS</strong> <strong>60</strong> <strong>Spyder</strong>:<br />
Propulsive power and low in consumption<br />
thanks to VarioCam Plus.<br />
<strong>The</strong> <strong>Boxster</strong> <strong>RS</strong> <strong>60</strong> <strong>Spyder</strong> creates enthusiasm<br />
not least due to its impressive thrust and its<br />
high reserves in power. One reason for this is the<br />
6-cylinder boxer engine with VarioCam Plus.<br />
<strong>The</strong> <strong>Boxster</strong> <strong>RS</strong> <strong>60</strong> <strong>Spyder</strong> – like all <strong>Boxster</strong> models –<br />
has this system to adjust the intake camshafts and<br />
to change the valve lift of the intake valves. In addition<br />
to the best running quality, low fuel consumption and<br />
fewer exhaust emissions, above all VarioCam Plus<br />
makes high performance and torque values possible.<br />
And VarioCam Plus is a 2-in-1 engine concept. It<br />
adjusts itself to the respective demand for power.<br />
<strong>The</strong> switch occurs without being noticed by means<br />
of the Motronic ME7.8. This results in spontaneous<br />
acceleration and extremely low engine noise.<br />
s Schematic representation of VarioCam Plus<br />
<strong>The</strong> valve-lift adjustment system consists of switchable<br />
bucket tappets that are guided by an electro-hydraulic<br />
switch valve. <strong>The</strong>y consist of 2 interlocking tappets<br />
that can be locked by means of a bolt. Either a large<br />
cam works on the intake valves via the exterior tappet<br />
or a small cam via the internal tappet. <strong>The</strong> intake<br />
control times are infinitely variable via a camshaft<br />
controller attached to the front of the camshaft that<br />
works according to the vane principle. <strong>The</strong> control<br />
occurs via an electro-hydraulic control valve.<br />
For example, in order to optimise the petrol intake<br />
during the warm-up phase at low temperatures,<br />
VarioCam Plus selects large valve lifts with retarded<br />
valve timing. In the mid engine speed and low load<br />
range, the system reduces fuel consumption and<br />
exhaust emission by switching to small valve lifts<br />
with advanced valve timings.<br />
To achieve maximum power and torque, the valve<br />
lift is raised and the timing advanced. n